Rubbing and polishing machine.



No. 999,191. PATENTED 11119.91, 1909.

` o. s. YARNELL.

RUBBING AND POLISHIYNGMACHINB,

APPLICATION FILED SEPT129, 1905. v

3 SHEETS-SHEET 1.

PATENTED AUG. 2,1, 1906.

0. s. YARNBLL, RUBBING AND POLISHING MACHINE.

APPLICATION FILED SEPT. 29, 1905.

3 SHBBTS-SHBBT Z.

C. "s. YARNB'LL.

,RUBING' AND. POLISHING MACHINE.

APPLI/QATION FILED. SEPT. 29, 1905.

s JSHEETS-Huma? s.

' PATENTED AUGI 21, 1906.

MMM/ fm1 f www5 s, Mm/fu.

/7/5 rfa/Wy ys UNITED STATES' PATENT OEEiOE.

CHARLES S. YAENELL, OE MINNEAPOLIS, MINNESOTA, ASSIGNOR' TO MOORE CARVlNG MACHINE COMRANY, OF' MlN N EAPOL'IS, MINNE- SOTA, A CORPORATION OF MINNESOTA.

`RUBBINGAND'PoLlsi-HNGMACHINE.

-Specication f Letters Patent.

Patented Aug. 21, 190e.v

. "Application llled September 29, 1905. Serial No. 280.644.

To 'all whom t -mafy'concern:

Be it known that 1,- CEAELES S. YAENELL,

' of Minneapolis,l Hennepin county, Minnesota l. reciprocating head. ".Machines of t is. char.l

`acter are shown in the patent issued to H. P. f #'Gale, October'29, 1901, No. 685,328, and in Vthe patent issued to me November 10, 1903,'

I My resentinvention consists in providing anadjustable ilexible backing or'su porting strip between the sanding-belt an the reciprocating head.

structions and. combination hereinafter described, and particularly pointed. out vin the claims; v

` In the part bf this specification, Figure 1 is a irontl elevation of a machine embedying myinvention. Fig.l 2 is aside 1' "ation and partial section of the rubbing-head. Fig. 3 is a section ofthe pressure-head on line'3 3 of Fig. 2. Fig. 4 is a section ol. the pressure-head Online 4 4 of Fig. 2. Figs. 5. and 6 are details illustrating themeans for securing the pressurehead to its supporting-standard.' Fig. 7 is'a detail elevation illustrating the means for supporting the flexible backing for the belt.'

' Fig. 8 is a detail on a plane at right angles to lthe plane oi Fig. 7 `Figs. 9 andi 1.() are detail vsections showing `themeans `for raising and lowering the reciprocating rubber.

"the machine, and 3 thework-su porting table thereorn The polishing-be vt 4 is suppor-'ted'upon the pulleys 5 and 6, one of which Isdriven by suitable means. Arranged within the polishing-belt is a bar 7isecured to a ereinafter v` described is mounted thereon. Suitable lmeans is provided vfor raising and lowering the bars 8 and'7 and for pressin g them downward withan l `desired amount o 'pressure The means s ownfor this pur-` i `The .invention consists, further, in the con- I cable 14 by clamping-hooks'15.

accompanyingY drawings, rormingv the under side of the carrier is a Standard 16.

vin the ends of 'the plate 17.

In the-drawings, 2represents the frame of lpose need notbe particularly described here# in, as the same are 'shown` and described in myA pending application for Letters Patent",l Serial- No.' 258,203, filed May 1, 1905. A pressure-head is'arranged to reciprocate up on that l prefer to employ for reciprocating the head and adjusting the stroke thereof are similar to those used for the same purpose in mysaid application and need not be herein 'the'guide and pressure bar 7, and the means described. Two orJnore such heads may be employed, if preferred.

The construction of pressure-head that I u refer .to employ is shown\ particularly in igs. 2 and 6 of the drawings. As here shown, a carrier'9 is provided'with a groove 'which,receivesthe bar 7, and said carrier-is secured to said bar by means o f suitable plates 10, secured in positionl by screws 11.

hiscarrier is' also provided with aseries of antii'riction-rollers 12, thatv bear against the under surface of the bar 7.l (See Figs. 2 and 4.) The carrier is clamped to the operating- Secured to The lower end of the standard 16 isforked,

and secured theretoisa late 17, having at its vcenter the hemispherIca-l projections 18. A bolt-hole extends through thisl plate atthe vcenter'of the projections, and this hole is preferably made 4to taper from each end toward the center.' y

A head-supporting late 19 is secured to the plate. C17-bythe olt 20, which passes vthrough the' center opening in the plate 17,' and bythe bolts 21, which pass through holes The. upper surface of the plate 19 is provided with a boss having a depression or socket in its upper "surface fitting the surface of the lower prof 'jection18, and a cap 22, having a similar` socket, is placeduponthe other projection 18, the parts being secured together by the bolt 20. Suitable springs 23 are placed around the lbolts 21":between the ends of the plates 17` and 19 to prevent tippingof shoe 24. 'Secured to the plate 19 is the adjustable loc shej24, preferably provided with a felt or y other suitable cushion 25, protected with paper. IThis shoe may besecured to the .plate 19 by the lugs 2,6 and spring 27, and any suitable means may be employedl for securing the v felt or other material to the under surface'of;

the head. I have here shown clamps 28,

adapted to be brought into engagement with the material-at the top ofthe adjustable shoe and held in place by bolts 29 and nuts 30.

I also provide a strip of flexible material arranged below the reciprocating headand above the sanding-belt. This consists, preferably, of`a strip of canvas, metal, or other suitable flexible material 31, having its end secured upon suitable rollers 32. One of said rollers is ligxed. The other is provided with a polygonal end adapted to receive a wrench for the purpose of turning the roller. roller is provided with a ratchetwheel 33, adapted to be engaged by a suitable dog 34. These rollers are mounted in pivoted posts 35, secured to the frame of the machine. By this means the flexible strip which forms a backing for the sanding-belt may be brought to any desired degree of tension. .The reciprocating head does not come in direct con- Vtact with the sanding-belt, but instead bears upon the backing 31 and presses said backing against the sanding-belt. As the head may be lraised or lowered and caused to exert any `desired amount of ressure upon the backing 31, it will follow t at the belt may be held with any desired degree of pressure u on the l surface to be'sanded. The flexible acking 31 is stationary in the sense that it' does not travel either with the sanding-belt or with the reci ocating head. Itis, however, capable o yielding, so as to permit any desired amount of pressure to be applied to the belt.

. I claim asmy invention- 1. The combination, in a rubbin'o and polishing machi Said.

ne, with a polishing-belt, of a4 4flexible stationary backing arranged above the'working side of said belt, and secured at its ends upon suitable supports, and a reciprocating head arranged above and engaging said backing', substantially as described.

2. The combination, in a rubbinfr and polishin machine, withasuitable polis 'ng-belt, of a exible backing extending parallel with and above said belt and secured at its ends'to means for driving thesame, 'of a strip of fleri; 5 5

ble stationary backing arranged'within "sa-id belt and in proximity to the back of the belt at the working side thereof, a reciprocating head arranged above said backing," andmeans for pressing said head against said backin for the purpose set forth.

4. T e combinatomin a rubbing and pol- L ishing machine, with a suitable Guide and pressurev bar, means for raising'and lowerin the same, of a reciprocating carrier arrange upon said bar, antifriction-rollers upon said.

carrier engaging the under surface of said bar, and a suitable pressure-head secured' upon said carrier. y ln witness whereof I have hereunto set my hand this 20th day of September, 1905.

CHARLES s. YARNELL.

Witnesses:

R. C. PAUL, M. E. SCOTT. 

